linux-kernel - [PATCH v3 0/6] ONE_REG interface for SBI FWFT extension

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Message-ID: <20250823155947.1354229-1-apatel@ventanamicro.com>
Date: Sat, 23 Aug 2025 21:29:41 +0530
From: Anup Patel <apatel@...tanamicro.com>
To: Atish Patra <atish.patra@...ux.dev>
Cc: Palmer Dabbelt <palmer@...belt.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Alexandre Ghiti <alex@...ti.fr>,
	Andrew Jones <ajones@...tanamicro.com>,
	Anup Patel <anup@...infault.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Shuah Khan <shuah@...nel.org>,
	kvm@...r.kernel.org,
	kvm-riscv@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH v3 0/6] ONE_REG interface for SBI FWFT extension

This series adds ONE_REG interface for SBI FWFT extension implemented
by KVM RISC-V. This was missed out in accepted SBI FWFT patches for
KVM RISC-V.

These patches can also be found in the riscv_kvm_fwft_one_reg_v3 branch
at: https://github.com/avpatel/linux.git

Changes since v2:
 - Re-based on latest KVM RISC-V queue
 - Improved FWFT ONE_REG interface to allow enabling/disabling each
   FWFT feature from KVM userspace

Changes since v1:
 - Dropped have_state in PATCH4 as suggested by Drew
 - Added Drew's Reviewed-by in appropriate patches

Anup Patel (6):
  RISC-V: KVM: Set initial value of hedeleg in kvm_arch_vcpu_create()
  RISC-V: KVM: Introduce feature specific reset for SBI FWFT
  RISC-V: KVM: Introduce optional ONE_REG callbacks for SBI extensions
  RISC-V: KVM: Move copy_sbi_ext_reg_indices() to SBI implementation
  RISC-V: KVM: Implement ONE_REG interface for SBI FWFT state
  KVM: riscv: selftests: Add SBI FWFT to get-reg-list test

 arch/riscv/include/asm/kvm_vcpu_sbi.h         |  22 +-
 arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h    |   1 +
 arch/riscv/include/uapi/asm/kvm.h             |  15 ++
 arch/riscv/kvm/vcpu.c                         |   3 +-
 arch/riscv/kvm/vcpu_onereg.c                  |  60 +----
 arch/riscv/kvm/vcpu_sbi.c                     | 172 +++++++++++--
 arch/riscv/kvm/vcpu_sbi_fwft.c                | 227 ++++++++++++++++--
 arch/riscv/kvm/vcpu_sbi_sta.c                 |  63 +++--
 .../selftests/kvm/riscv/get-reg-list.c        |  32 +++
 9 files changed, 467 insertions(+), 128 deletions(-)

-- 
2.43.0